Canal Navvy
Well-known member
I would try using a fuel bug killer at a concentration way over the recommended dose and directly into the pump at this stage 
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sandbags89
Member
ah okay. No its not snail like, definitely sounds like its giving it a good try.
Mick-the-fitter
It’s what I do!
Did it start and run? Or is this a recent problem?
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Maxus
Well-known member
Have you tried loosening the nuts on the injectors as your turning it over then tightening when fuel is coming through? Might be some kind of air lock?
Also have you tried taking the injectors out, reconnecting them upside down, turning the engine over and checking spray patten? That could help rule out injectors and give some indication about fuel pump.
Worse comes to worse, how difficult would it be to take the engine out entirely? I would have thought it'd be possible to lift out by hand or perhaps with some rudimentary lifting gear or a buddy. You could take it somewhere then... might be a daft idea!
Also have you tried taking the injectors out, reconnecting them upside down, turning the engine over and checking spray patten? That could help rule out injectors and give some indication about fuel pump.
Worse comes to worse, how difficult would it be to take the engine out entirely? I would have thought it'd be possible to lift out by hand or perhaps with some rudimentary lifting gear or a buddy. You could take it somewhere then... might be a daft idea!
V8Druid
do it as well as you can,but learn to do it better
but what was it spinning over like ????
.... it will not work unless the starter is properly throwing it over .... you've not said whether the thing is whizzing over or crawling/struggling over
V8Druid
do it as well as you can,but learn to do it better
I'm guessing this is half the issue Doob ..
M
Maxus
Well-known member
but what was it spinning over like ????
yanmar wont start
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Tacitus
Active member
Definitely "Andante" and not "Allegro".
In normal conditions ti should start even at that speed, but with low compression and some other unknown issues, (air in the lines, injectors spray incorrect, pump pressure low, fuel contaminated, etc) it does not.
I am afraid your best bet is to find a local mobile plant mechanic. I am sure the guys in this forum can recomment one near you. There are thoushands of mini diggers in London and all need maintenance and repairs.
In normal conditions ti should start even at that speed, but with low compression and some other unknown issues, (air in the lines, injectors spray incorrect, pump pressure low, fuel contaminated, etc) it does not.
I am afraid your best bet is to find a local mobile plant mechanic. I am sure the guys in this forum can recomment one near you. There are thoushands of mini diggers in London and all need maintenance and repairs.
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sandbags89
Member
used to work all the time. then broke down a few times randomly and then managed to start back up. Until the final time. I explained it in more detail in my first post.
yes loosened the nuts to bleed any air that may be trapped and also see fuel spilling out.
Not sure what you mean by upside down. But originally took them out the holes, reconnected them to the fuel lines and let them hang out whilst turning it over and I got some spray. Since then they have been overhauled as the engineer said they were "knackered".
yes i imagine it may be an option if i could figure out where its mounted and see if it lifts out, last resort ideally
would you say thats a slow crank from the starter? I think i've got it turning over faster than that after battery charged up again and use of booster. Maybe i'll upload another vid of what its like recently.
air in the lines - ive bled it in all the ways i could think of...engineer also did this.
spray pattern...i wouldn't have a clue about that. As i said they have apparently been overhauled so I assume this is tested when they do this? Out of curiousity, what would cause an injector to suddenly spray incorrectly, dirt?
pump pressure? as in fuel pump? How would i tell if it is low?
fuel contamination - i drained the tank completely and topped up with fresh fuel, in case of water or other contaminants, so I would assume that should not be an issue.
Yes please, if anyone does have any reliable contacts for mobile engineers around London do let me know.
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sandbags89
Member
been sent this diagram that shows a couple relays that could affect starting... how would i test a relay to know if its doing its job?
it also shows the slow-blow fuse on this diagram that i mentioned previously.. unfortunately it does not show the actual locations in regards to where it is on the machine. My manual seemed to give me the wrong location for the slow-blow fuse strangely, but it lists it as a cause for non-starting in the troubleshooting section. need to find that effing thing!
V8Druid
do it as well as you can,but learn to do it better
for pity's sake ................... buy it a new battery ..... and if it still doesn't throw it over .. you are going to have to get that starter off and sorted .... all connections are good, so you say, so there ain't much more you can do to get it spinning over rapidly enough ..
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Tacitus
Active member
Ockham Razor, among competing theories, chose the one with less assumptions
About injectors they are precision gadget that require precision repair or replacement. I worked in a diesel generators repair workshop for years and we used to do the injectors in house yet sent the pumps away. There is not much to doing the injectors, if you have the right tools and know how.
Tackle one problem at the time, and leave the more complex one out. Surely removing the starter motor and taking it to an auto electrician should rate as relatively simple, even if it involves removing the exhaust manifold. Let's hope you don't break a stud.
About injectors they are precision gadget that require precision repair or replacement. I worked in a diesel generators repair workshop for years and we used to do the injectors in house yet sent the pumps away. There is not much to doing the injectors, if you have the right tools and know how.
Tackle one problem at the time, and leave the more complex one out. Surely removing the starter motor and taking it to an auto electrician should rate as relatively simple, even if it involves removing the exhaust manifold. Let's hope you don't break a stud.
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doobin
Well-known member
Stick another battery directly onto the starter in series, making it 24v. That'll get it started so you can get it to a proper workshop. Also- blowtorch down the inlet manifold (your favourite, might have mentioned it already)
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Tacitus
Active member
Do you now if the solenoid cut off works properly?
Here is how to test it. Yours may look different.
Here is how to test it. Yours may look different.
doobin
Well-known member
If he's got fuel coming out when cranking it with cracked injectors then the shutoff must be OK.
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sandbags89
Member
hi V8, yes i've pretty much done this. I have like 3 batteries sitting around this thing. One of which is a new and larger battery from a van which I've connected directly to. The engineer also daisy chained so 2 were connected at the same time. So i don't think its battery issue. Starter...possibly, i'll have to connect battery directly as some suggested.
yes will try get to the starter and power directly as suggested.
not exactly sure what you mean regarding blowtorching the inlet mani. could you explain further please
yes this works mate. there is a noticeable loud click when it operates. I've also had the thing off and operated it and the pin retracts as it should.
Mick-the-fitter
It’s what I do!
Not that easy, I did a warranty engine replacement in 2004 that had a broken crankshaft, basically half the machine needed to be stripped!
Mick-the-fitter
It’s what I do!
Take the stop solenoid out, this is a mechanical lift pump model, does that supply fuel to the injection pump.
V8Druid
do it as well as you can,but learn to do it better
he's got fuel at the injector lines when cracked Mick
basically use a blow lamp/torch to put preheated air into the inlet manifold .. makes for an easier start ... can make a big difference if/when the weather is particularly cold
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bobthebuilder
Well-known member
the video looks like its trying ,are you sure you havnt got a tank full of water ? or something thats not diesel ?
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